This page explains how David Trykall (USATT# 73055)'s rating went from 1960 to 1968 at the 2011 Indiana State Closed held on - 17 Apr 2011. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.